From an recent overview in The Times of India:
India — a nation of child sex abusers?
A survey conducted by Ministry of Women and Child Development in association with the United Nations Children's Fund ( Unicef) and a few Indian NGOs working for child's rights found that more than 53% of children in India are subjected to sexual abuse, but most don't report it. The survey was conducted in 2007 and covered 13 states across the country with a sample size of 12,447. NGOs are demanding an in-depth study to address the issue properly.